Iroquois County, Illinois: hazard risk
FEMA rates Iroquois County's overall risk Relatively Low (score 74.0 of 100, higher than 73% of rated U.S. counties); 1 of its 14 hazards are rated Relatively High or Very High, led by cold wave. Its storm record holds 564 events since 1950.
FEMA's rating for each hazard
These are FEMA's county-wide model ratings and this county's storm record. They are not an assessment of any property, address or building, and not insurance advice: a property's risk depends on its own elevation, construction and location.
FEMA gives each hazard its own rating, and a rating does not follow the score from one hazard to the next: a hazard with a higher score can carry a lower rating than another. The table sorts by FEMA's rating, then by score (0 to 100, the county against every other county for that hazard).
| Hazard | Risk rating | Score | Expected annual loss |
|---|---|---|---|
| Cold Wave | Relatively High | 93.6 | $10M |
| Riverine Flooding | Relatively Moderate | 79.6 | $20M |
| Earthquake | Relatively Low | 71.1 | $891K |
| Hail | Relatively Low | 66.8 | $508K |
| Tornado | Relatively Low | 57.2 | $1.6M |
| Strong Wind | Relatively Low | 46.4 | $514K |
| Heat Wave | Relatively Low | 44.0 | $289K |
| Lightning | Relatively Low | 33.1 | $128K |
| Winter Weather | Relatively Low | 26.9 | $27K |
| Landslide | Very Low | 38.5 | $610 |
| Hurricane | Very Low | 30.6 | $15K |
| Ice Storm | Very Low | 26.2 | $26K |
| Drought | Very Low | 22.6 | $8K |
| Wildfire | Very Low | 3.5 | $1K |
Source: FEMA National Risk Index, December 2025 release. A model of future loss, not a count of past events. FEMA's National Risk Index map.
What the record holds
| Hazard | Records | Deaths | Damage | Rank in state | Rank in U.S. |
|---|---|---|---|---|---|
| Severe thunderstorm wind | 237 | 0 | $2.3M | 100th of 102 | 2031st of 3,080 |
| Hail | 73 | 0 | $458K | 102nd of 102 | 2478th of 3,080 |
| Tornadoes | 64 | 0 | $41M | 58th of 102 | 886th of 3,080 |
| Winter storms | 55 | 1 | – | 102nd of 102 | 2269th of 3,077 |
| Floods | 54 | 0 | $8.7M | 95th of 102 | 1883rd of 3,080 |
| High wind and dust storms | 24 | 0 | $158K | 84th of 102 | 2047th of 3,080 |
| Extreme cold | 19 | 2 | – | 67th of 102 | 1274th of 3,076 |
| Drought | 11 | 0 | – | 91st of 102 | 2010th of 3,063 |
| Heat | 9 | 0 | – | 96th of 102 | 1614th of 3,076 |
| Heavy rain | 5 | 0 | – | 58th of 102 | 1720th of 3,080 |
| Lightning | 2 | 0 | $151K | 75th of 102 | 1974th of 3,080 |
| Wildfires | 2 | 0 | $10K | 10th of 102 | 930th of 2,972 |
Source: NOAA NCEI Storm Events Database, 1950 to 2026-06-30; damage in 2025 dollars. Search the record at NCEI.
The full Iroquois County record: every hazard by year and month, the deadliest events and FEMA's declarations.